Four Defendants Sentenced in $1.5M USPS Bribery Scheme

Postal workers and trucking company owners pleaded guilty to conspiracy and bribery charges.

Apr. 7, 2026 at 2:04am

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An extreme close-up photograph of a stack of cash and a set of car keys against a pitch-black background, conceptually representing the financial corruption at the heart of this crime.A bribery scheme involving U.S. Postal Service contracts led to federal prison sentences for four defendants who abused their positions of trust.Denver Today

Four individuals have been sentenced to federal prison for their roles in a $1.5 million bribery scheme involving U.S. Postal Service (USPS) contracts. Two USPS employees, Zechariah Yi and Tai Ryoung Rho, accepted kickbacks from the owners of two Colorado and Texas trucking companies, Wan Jin Yoon and Hong Jin Yoon, in exchange for helping the companies secure around $15 million in USPS contracts.

Why it matters

This case highlights the ongoing problem of public corruption and fraud within federal agencies. The defendants abused their positions of trust with the USPS for personal financial gain, undermining public confidence in government institutions.

The details

According to court documents, Yi and Rho, both USPS employees in Aurora, Colorado, solicited and accepted approximately $1.5 million in kickbacks from Wan Jin Yoon of Plano, Texas, and Hong Jin Yoon of Denver, the owners of the trucking companies that benefited from the scheme. All four defendants pleaded guilty to federal charges, with Yi receiving 42 months in prison, Rho 30 months, Wan Yoon 24 months, and Hong Yoon 3 months. The group also agreed to forfeit more than $300,000 in cash and two vehicles.

  • On March 26 and 27, 2026, the defendants were sentenced by U.S. District Judge Karen Gren Scholer.

The players

Zechariah Yi

A former USPS Senior Network Analyst in Aurora, Colorado, who pleaded guilty to receiving a bribe by a public official.

Tai Ryoung Rho

A USPS employee in Aurora, Colorado, who pleaded guilty to conspiracy to commit honest services wire fraud.

Wan Jin Yoon

The owner of a trucking company in Plano, Texas, who pleaded guilty to conspiracy to commit honest services wire fraud.

Hong Jin Yoon

The owner of a trucking company in Denver, Colorado, who pleaded guilty to conspiracy to commit honest services wire fraud.

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What they’re saying

“The defendants fraudulently secured a government contract in a scheme that involved paying kickbacks to government employees, who misused their positions of trust with the U.S. Postal Service for personal gain.”

— R. Joseph Rothrock, FBI Dallas Special Agent in Charge

“The public must have confidence that Postal Service employees will conduct their work in an honest manner. When employees commit serious offenses, such as taking bribes, they will be aggressively investigated and prosecuted by Special Agents with the USPS OIG.”

— Kevin Cloninger, Executive Special Agent in Charge, U.S. Postal Service Office of Inspector General

“The defendants 'resorted to bribery and corruption simply to line their own pockets.'”

— Ryan Raybould, U.S. Attorney

The takeaway

This case highlights the ongoing challenge of rooting out public corruption and fraud within federal agencies. It underscores the importance of maintaining public trust in government institutions and the need for rigorous oversight and enforcement to deter such abuses of power.